Re: How to design FIR filter with matematical equation?

On May 23, 8:11 am, "c1910" <c_19...@xxxxxxxxxxx> wrote:
hi,
i'm very new with DSP FIR.
i need to make a Bandpass filter with FIR design. first, i use the AM
signal for the input, then i want to get the information signal by
filtering the AM signal.
The problem is to get the value of transfer function of the FIR filter, i
need a mathematical equation,
i don't know where to start and what equation or theory to use?!
can you give me an equation to start?
or an example to design FIR filter?
this is for my thesis, and i'm using the DSK TMS320C54...
please give me some input...thanks...


You can get a mathematical equation by using a windowing method on an
ideal bandpass filter. But then what?

But for more practical concerns - why do you want to use an FIR
structure for your band pass filter? FIRs are not usually the best
thing for this. I believe that trying to directly go to a solution
without any reason for choosing said solution will lead to diaster. If
not that, then a lot of wasted time and effort. Get Rick Lyon's book
"Understanding Digital Signal Processing" and invest the time there
learning the subject. Then you will actually have a chance of getting
your thesis material to work. I truly believe that this will be your
path of least effort to success.

Clay



.

Relevant Pages

  • Re: Hilbert transform using FFT approach
    ... If the number of taps is odd, ... >> to be true) for window based designs of Hilbert transformers. ... >> except the middle coefficient for an odd length FIR filter. ...
    (comp.dsp)
  • Re: Assembly optimized error
    ... I've written an assembly optimized program. ... it is fir filter. ... I know that FIR basicaly works. ... You might try filling unused memory (assuming this is some ...
    (comp.dsp)
  • Re: Suche Buch ueber Filter
    ... IMHO zuerst einmal auf den Strukturen für analoge Filter auf. ... Mir wurde dieses Semester in diversen Vorlesungen verkauft das FIR ... Filter keinen analogen Prototypen benötigen. ... Allerdings geht man da anscheinend auch von den klassischen analogen Approximationen aus, Butterworth, Tschebyscheff, Cauer etc., scheint die aber direkt im Z-Bereich zu approximieren, wenn ich das richtig verstanden habe. ...
    (de.sci.electronics)
  • Re: doubts in the design of FIR filter
    ... I have some doubts in the design of FIR filter...pls clarify ... 1.Can i set  the clock frequency of the FIR filter at any frequency i ... This is a question on hardware, not FIR design. ... 'set the clock frequency' of a FIR filter. ...
    (comp.dsp)
  • Re: How to design FIR filter with matematical equation?
    ... i need to make a Bandpass filter with FIR design. ... The problem is to get the value of transfer function of the FIR filter, ... You can get a mathematical equation by using a windowing method on an ...
    (comp.dsp)
Loading